#include<iostream>
using namespace std;
int main()
{
	int n;
	cin >> n;
	string s;
	cin >> s;
	for (int i = 0; i < n; i++)
	{
		for (int j = 0; j <= i; j++)
		{
			cout << s;
		}
		cout << endl;
	}



	return 0;
}